Head of a hammer



FIG. 1 is a perspective view of a head of a hammer, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is top view thereof; and,

FIG. 7 is a cross sectional bottom plan view thereof along line 7—7 of FIG. 2.

The broken line showings of the handle are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a head of a hammer, as shown and described. 